Defensive publication

ABSTRACT

PREPARATION OF BASIC-DYEABLE POLY(ETHYLENE TEREPHTHALATE) AND ANALOGOUS COPOLYESTERS HAVING IMPROVED SPINNING CHARACTERISTICS BY THE EMPLOYMENT IN THE PREPARATION OF THE POLY(ETHYLENE TEREPHTHALATE), OR ANALOGOUS COPOLYESTERS CONTAINING SULFONATED COMONOMERS, OF A TITANIUM CATALYST IN COMBINATION WITH AN ACID PHOSPHATE ADDITIVE WHICH FUNCTIONS TO ELIMINATE OF SUBSTANTIALLY REDUCE SPINNERET PROBLEMS WHEN THE COPOLYESTERS CONTAINING THE CATALYST AND ADDITIVE IS MELT SPUN. EXAMPLES INCLUDE COMONOMERS SUCH AS SULFONATED ISOPHTHALIC ACID, MGHTI(OC4H9)6 AND ETHYL ACID PHOSPHATE WHEREBY SPINING AT LEAST 1,000 POUNDS OF THE MOLTEN BASIC DYEABLE COPOLYESTER CAN BE CARRIED OUT FOR 40 TO 100 OR MORE HOURS WITHOUT SPINNERET DIFFICULTIES.

DEFENSE/E PUBLTCATIQN UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 O.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Office makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED DECEMBER 14:, 1971 PROCESS FOR PRODUCING SPINNABLE, BASICDYEABLE (POLYETHYLENE TEREPHTHALATE) COPOLYESTERS Charles J. lKibler andBobby J. Sublett, both of R0. Box 511, Kingsport, Tenn. 37462 Filed Mar.10, 1971, Ser. No. 123,088 lint. Cl. (308g 17/013 U.S. Cl. 260-75 S NoDrawing. 12 Pages Specification Preparation of basic-dyeablepoly(ethylene terephthalate) and analogous copolycsters having improvedspinning characteristics by the employment in the preparation of thepoly(ethylcne terephthalatc), or analogous copolyesters containingsulfonated comonomcrs, of a titanium catalyst in combination with anacid phosphate additive which functions to eliminate or substantiallyreduce spinneret problems when the copolyestcr containing the catalystand additive is melt spun. Examples include comonomers such assulfonated isophthalic acid, MgHTi(OC H and ethyl acid phosphate wherebyspinning at least 1,000 pounds of the molten basic-dyeable copolyestercan be carried out for 40 to 100 or more hours without spinneretdifiiculties.

